mpi_pack_external_size(3openmpi) [osx man page]

MPI_Pack_external_size(3OpenMPI)										  MPI_Pack_external_size(3OpenMPI)

NAME

       MPI_Pack_external_size - Calculates upper bound on space needed to write to a portable format

SYNTAX

C Syntax
       #include <mpi.h>
       int MPI_Pack_external_size(char *datarep, int incount,
	    MPI_Datatype datatype, MPI_Aint *size)

Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_PACK_EXTERNAL_SIZE(DATAREP, INCOUNT, DATATYPE, SIZE, IERROR)

	    INTEGER	   INCOUNT, DATATYPE, IERROR
	    INTEGER (KIND=MPI_ADDRESS_KIND) SIZE
	    CHARACTER*(*)  DATAREP

C++ Syntax
       #include <mpi.h>
       MPI::Aint MPI::Datatype::Pack_external_size(const char* datarep,
	    int incount) const

INPUT PARAMETERS

       datarep	 Data representation (string).

       incount	 Number of input data items (integer).

       datatype  Datatype of each input data item (handle).

OUTPUT PARAMETERS

       size	 Upper bound on size of packed message, in bytes (integer).

       IERROR	 Fortran only: Error status (integer).

DESCRIPTION

       MPI_Pack_external_size  allows the application to find out how much space is needed to pack a message in the portable format defined by the
       MPI Forum. It returns in size an upper bound on the increment in position that would occur in a call to	MPI_Pack_external  with  the  same
       values for datarep, incount, and datatype.

       The  call returns an upper bound, rather than an exact bound, as the exact amount of space needed to pack the message may depend on context
       and alignment (e.g., the first message packed in a packing unit may take more space).

NOTES

       The datarep argument specifies the data format. The only valid value in the current version of MPI is "external32". The	argument  is  pro-
       vided for future extensibility.

ERRORS

       Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
       tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception  mechanism
       will be used to throw an MPI:Exception object.

       Before  the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for
       I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN  may	be
       used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

       See the MPI man page for a full list of MPI error codes.

SEE ALSO

       MPI_Pack_external
       MPI_Unpack_external

Open MPI 1.2							  September 2006				  MPI_Pack_external_size(3OpenMPI)

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MPI_File_get_view(3OpenMPI)											       MPI_File_get_view(3OpenMPI)

NAME

       MPI_File_get_view - Returns the process's view of data in the file.

SYNTAX

       C Syntax
	   #include <mpi.h>
	   int MPI_File_get_view(MPI_File fh, MPI_Offset *disp,
		  MPI_Datatype *etype, MPI_Datatype *filetype,
		     char *datarep)

       Fortran Syntax (see FORTRAN 77 NOTES)
	   INCLUDE 'mpif.h'
	   MPI_FILE_GET_VIEW(FH, DISP, ETYPE,
		   FILETYPE, DATAREP,  IERROR)
	     INTEGER FH, ETYPE, FILETYPE, IERROR
	     CHARACTER*(*) DATAREP
	     INTEGER(KIND=MPI_OFFSET_KIND) DISP

C++ Syntax
       #include <mpi.h>
       void MPI::File::Get_view(MPI::Offset& disp,
	    MPI::Datatype& etype,
	    MPI::Datatype& filetype, char* datarep) const

INPUT PARAMETER

       fh	 File handle (handle).

OUTPUT PARAMETERS

       disp	 Displacement (integer).

       etype	 Elementary data type (handle).

       filetype  File type (handle). See Restrictions, below.

       datarep	 Data representation (string).

       IERROR	 Fortran only: Error status (integer).

DESCRIPTION

       The  MPI_File_get_view routine returns the process's view of the data in the file. The current values of the displacement, etype, and file-
       type are returned in disp, etype, and filetype, respectively.

       The MPI_File_get_view interface allows the user to pass a data-representation string via the datarep argument.

FORTRAN 77 NOTES
       The MPI standard prescribes portable Fortran syntax for the DISP argument only for Fortran 90.  FORTRAN 77 users may use  the  non-portable
       syntax.

	    INTEGER*MPI_OFFSET_KIND DISP

       where MPI_OFFSET_KIND is a constant defined in mpif.h and gives the length of the declared integer in bytes.

ERRORS

       Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
       tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception  mechanism
       will be used to throw an MPI:Exception object.

       Before  the error value is returned, the current MPI error handler is called. For MPI I/O function errors, the default error handler is set
       to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler; the predefined error handler MPI_ERRORS_ARE_FATAL  may
       be used to make I/O errors fatal. Note that MPI does not guarantee that an MPI program can continue past an error.

Open MPI 1.2							  September 2006				       MPI_File_get_view(3OpenMPI)

Linux and UNIX Man Pages

mpi_pack_external_size(3openmpi) [osx man page]

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